JPS5919754Y2 - vinyl chloride leather - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to vinyl chloride leather with extremely excellent texture.

Conventionally, for vinyl chloride leather, a liquid adhesive has been used to bond the surface layer of the soft vinyl chloride sheet and the backing fabric.

For example, as this type of liquid adhesive, plastisol and orgasosol of vinyl chloride resin, emulsion adhesive of vinyl acetate resin and acrylic resin are used, and these liquid adhesives are gravure-based using a 60 to 80 mesh roll. Apply to the backing fabric surface by printing or by applying it solidly.

However, in this case, the liquid adhesive penetrates into the inside of the backing fabric, the excess solid content remains on the surface of the backing fabric, and this residual adhesive component adheres to the vinyl chloride sheet. As a result, the flexibility and texture of the backing fabric are significantly reduced, resulting in a so-called stiff feeling.

In addition, if more pressing force than necessary is applied during the embossing process to increase the adhesive strength between the lining cloth and the PVC sheet, the PVC sheet will sink into the lining cloth, further increasing the stiffness and leaving the leather with an extremely poor texture. Unobtainable p・tsuta.

Recently, open-cell foam leather has been developed using the calendar method as one way to improve the functionality of PVC leather, but this open-cell foam sheet has a weak surface strength, so it is difficult to use needle-punched sheets or hot perforate sheets on the surface. Alternatively, it has been proposed to stack perforated sheets, etc., but in this case, if a liquid adhesive is used, the adhesive will penetrate into the continuous pores and block the pores, and furthermore, The pores of the perforated sheet are also blocked, resulting in problems such as poor communication.

The present invention was made in view of the current situation, and an example of the invention will be described with reference to the drawings.
and a porous material 3 such as a base fabric such as a woven or knitted fabric, a nonwoven fabric, paper, or a perforated sheet, which are bonded together using a powdered hot melt adhesive 2, as shown in FIG. The example shown is an example of adhesion to a textile fabric, and FIG. 2 is an example of adhesion to a perforated sheet 3'' having pores 3' formed by needle punching, hot perforation, or punching.

The powdered hot melt adhesive 2 is, for example, PES-110P, -120P, 140 manufactured by Toagosei Kagaku Kogyo Co., Ltd.
Polyester resins such as P and -170P, with an average particle size of around 100 microns, are suitable.

There are two methods for applying the powdered hot melt adhesive 2 to the soft vinyl chloride sheet 1: an electrostatic coating method and an aqueous disvergeman method. Apply on one side in a single layer.

When the vinyl chloride resin sheet 1 is an open-cell foam sheet,
The particle size of the adhesive powder must be selected strictly.

If the powder is too fine, the powder particles will get into the communicating holes and block them, and will also reduce the adhesive effect.

Therefore, a powder with a particle size larger than that of the continuous pores should be used, and approximately 200 microns is optimal.

After scattering or applying the powdered adhesive 2 onto the vinyl chloride sheet 1 in this way, a base fabric such as woven fabric or knitted fabric or a porous material 3 such as a perforated sheet is placed on top of the adhesive, and the entire surface is 15
When the porous material 3 and the vinyl chloride sheet 1 are placed in a heating furnace at 0-170'C for 1 minute and immediately pressed with a pressure roll, the porous material 3 and the vinyl chloride sheet 1 are discontinuously and almost completely adhered by powder particles.

The amount of powdered adhesive 2 applied may be 30 to 40 g/m2,
In this case, the adhesive strength with the plain woven fabric 3 is 3 to 3.8 kg/3
In cm width, the standard value for automotive leather is 2.4 kg/3 cm.
I am satisfied with the width.

Furthermore, in the case of adhesion between open-cell foam sheets) and hot perforation sheets 1 to 3'', the above coating amount provides a strong adhesion to the extent that interlayer destruction of the cell layer occurs, and it has good air permeability and water permeability. was not hindered in any way.

In the vinyl chloride leather according to the present invention, the vinyl chloride sheet and the porous material are bonded discontinuously using powder particles, so the flexibility and texture of the porous material are not impaired in the slightest. If it is an open-cell foam, it can be laminated with a porous material without reducing its air permeability and water permeability.

[Brief explanation of the drawing]

The drawing shows an example of the vinyl chloride leather of the present invention.
Fig. 1 is a longitudinal sectional front view, Fig. 2 is a longitudinal sectional front view of another embodiment, and Fig. 3 is a longitudinal sectional front view before adhesion. In the figures, 1 is a vinyl chloride sheet, and 2 is a hot melt adhesive. , 3, 3' are porous materials.

Claims (2)

[Scope of utility model registration request] (1) A soft vinyl chloride sheet and a porous material such as a base fabric, nonwoven fabric, paper, or perforated sheet are bonded discontinuously using a powdered hot melt adhesive in a single layer of powder particles. PVC leather featuring (2) The vinyl chloride leather according to item 1 above, wherein the soft vinyl chloride sheet 1 is an open-air foam sheet.